Since I started all of this from that game and also got some nice quest editor recently, with info I got from 2nd G I decided to give 3rd another try. Had to patch lots of values instead of just code since it loads speed constants from files instead of setting them in the code, but whatever since all of those mh games are bothersome anyway.

Tested even less than 2nd G, so I might modify it in the future. Minor stuff likely will always be a bit faster, but gameplay related stuff should be fine.
Edit:
- to specify: player/felyne/npc's/normal monsters/quest timer speed in village/during quest was patched in this patch initially as well as 60fps and a fmv fix. If none of that works for you, then for whatever reason the patch did not activated, probably because you loaded a savestate and lots of things in this game actually have to load properly.

I know there are some things still to patch which I missed like big monsters, likely some activities, stamina etc which runs at x2 speed. I'm currently trying to make 2nd G patch as close to perfection as I can and will not work on two of those games at the same time since they're *put random swear here* bothersome to patch with the 3rd being worse offender and I'm doing it alone in my free time.
Thanks everyone who understand and for listing few things I missed before I even tested it, I will certainly post an update when I have time to do anything more with it:3, hope there aren't any that don't understand but if - well you know where you can go and do what. :x